Saw-guide.



IlNo. 694,337.

Patentdreb. 25,4 |902. c. n. VAN Huma.

sAw GumEf (Appieazion med sepa. 25, 190.1.)

e(No Model.)

wie Mf/gaMMw-Y;

aulww UNITED STATES PATENT OFFICE.

CHARLES R. VAN HORN, OF BAY MILLS, MICHIGAN, ASSIGNOR TO THE HALL &MUNSON CO., OF BAY MILLS, MICHIGAN.

SAW-GUIDE.

SPECIFICATION forming part of Letters Patent 1\T o. 694,337, datedFebruary 25, 1902. Application filed September 25, 1901. Serial No.76,484. (No model.)

To @ZZ whom, t may concern:

Be it known that I, CHARLES R.VAN HORN, a citizen of the United States,residing at Bay Mills, in thecounty of Chippewa and State of Michigan,have invented a new and useful Saw-Guide, of which the following is aspecification.

This invention relates to saw-guides, and while designed especially foruse in connection with double-cutting band-saws it will be evident tothose skilled-in the art that it may be employed upon other kinds ofsaws.

Double-cutting band-saw mills as ordinarily constructed are not providedwith an upper guide, the reason being that the mill can be raised orlowered, so that the top wheel may be located close to the log, theimpressionv being that the saw delivered from the wheel so close to itswork will be sti enough to maintain a true course throughout the cutwithout varying one way or the other. Actual practice, however, hasproven this reason fallacious, especially in cutting deal or other thicklumber. For instance, the top wheels of these machines are usually abouteight feet in diameter, and in order to allow a thick board or plank topass between the inside of the saw and clearthe wheel the latter must beraised considerably, leaving as much as fourteen inches of saw betweenits point of leaving the wheel and its entrance into the log.

The object of the present invention is to provide a guide which may beapplied to the saw at a point directly over and close to the top of thecut, thus holding said saw rigidly to its proper course and obviatingthe free span, as above described.

Another feature of the invention resides in supporting this guiderigidly and securely at its opposite ends, so that it will remain iirmand immovable during the operation of either cutting edge of a doublesaw.

A still further feature relates to means whereby the guide may be adjusted to suit the various classes of work and the conditions under whichthe saw must be operated.

In the accompanying drawings the preferred embodiment of the inventionis fully illustrated, and its construction and operation is described iuthe following specification. The invention is, however, not to belimited to the exact form shown, but is'open to such changes andmodifications as may be permitted by the scope of the appended claims.

In the drawings, Figure 1 is a side elevation of the upper portion of aband-saw mill, showing the improved guide applied thereto. Fig. 2 is atop plan view of the guide detached. Fig. 3 is a horizontal sectionalview of the same; and Fig. et is a front'elevation of the guide, showingthe outer guide member in raised position.

Similar numerals of reference designate corresponding parts in all theiigures of the drawings.

In Fig. 1 the upper portion of a Well-known double-cutting band-saw millis shown, the wheel being designated 10, the saw 1l, and the yoke of theframe l2. The guide which forms the subject-matter of the presentinvention is supported upon this yoke and is constructed in thefollowing manner: A pair of spaced supporting-arms 13 are arranged uponopposite sides of the wheel, being provided at their outer ends withclamping-yokes 14:, which are secured to the upper ends of curvedstandards 15, which standards are fastened at their lower ends by meansof suitable clamps 16 to the yoke 12, preferably in line with the rim ofthe wheel. Horizontal brace-rods 17 are secured at their outer ends insockets 18, arranged upon the inner ends of the supporting-arms, thesebrace-rods bey ing fastened by clamps 19 to the frame 12, as

clearly shown in Fig. 1. The supporting-arms 13 are provided withhorizontal longitudinally-disposed slots 20 and channels 21, whichchannels are located in the opposing faces of their outer ends. They arefurthermore provided on their outer faces with the lugs 22, havinghorizontally disposed openings 23. (Shown in Fig. 3.)

An inner clamping element (designated as a whole by 24) is slidablyconnected to the supporting element, said element comprising aguide-plate 25, having at its opposite ends guide-arms 26, which areslidably mounted uponA the inner faces of the supporting-arms 13. Theguideplate 25 is provided in its outer IOO v with the guide-plate andhave on their outerY -and the walls of the sockets.

face with dovetailed tapering sockets 27, arranged to receivesimilarly-shaped bearingblocks 28, preferably made of Babbitt or similarmaterial, said blocks projecting a slight distance beyond the face ofthe plate and being of less Width than the sockets. These bloeks areheld in place by keys 29, inserted in the spaces between the edges ot'.said blocks The keys are so constructed that they may be applied uponthe inner or outer sides of the bearing-blocks, so that said blocks maybe arranged closely together or some distance apart, as shown in thedrawings. The guide-arms 26 preferably have a pivotal connectiomas shown'at 30,

faces longitudinal ribs 3l, which slidably engage in the channels 2l ofthe supportingarms. They also are provided with outwardlyextending ears32, which pass through the inner slots 20ct' the guide-arms and areengaged by adjusting-screws 33, said adjustingscrews being journaled inthe openings 23 of the lugs 22 and having collars 34, which hold themagainst longitudinal displacement. Holding-screws 35 are passed throughthe other slots 20 of the holding-arms and are threaded into theguide-arms-26, suitable washers 36 being located o ver said slots, asshown in Fig. 3.

An `outer guide element in the form of a plate 37 is located in linewith the inner guideplate 25, said outer element being provided in itsinner face with sockets 38, bearingblocks 39 and keys 40, constructed inall respects similar to those of the inner element.

AThis outer element is held in place by means nuts 44 being threaded onthe projecting ends, constituting means for adjusting the outer elementtoward and from the inner one and also constituting means for clampingsaid element rigidly in place.

The operation of the device will be readily apparent. The saw is placedbetween the outer and inner guiding elements, which are so adjusted thatthe bearing-blocks will rest against the opposite sides of said saw. Theinner guide member may be readily adjusted to any desired position byloosening the holding-bolts 35 and turning the adjusting-screws 33.Furthermore, either guidearm can be moved independently, so as to throwthe inner guide-plate atan inclination,

Vif desired or necessary. The outer member may likewise be adjusted tocorrespond to the position of the inner member by moving the-necessarynuts upon the holding-bolts.

`It will be observed, furthermore, that the guides are held rigidly attheir opposite ends, theouter one being supported upon the bolts 4laud-the inner one by the ribs of the arms fitting in the grooves of thesupports.

From the foregoing it is thought that the construction, operation, andmany advantages of the herein-described invention will be apparent tothose skilled in the art Without further description, and it Will beunderstood that various changes in the size, shape, proportion, andminor details ot' construction may be resorted to Without departing fromthe spirit or sacrificing any of the advantages of the invention.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is-

l. In a saw-guide, the combination with the saw, of spaced substantiallyhorizontally disposed supports located in angular relation to the saw,and a guide element mounted onl the spaced supports and movablelongitudinally thereon, said guide elements being movable toward andfrom the saw.

2. In a saw-guide, the combination with the saw, of spaced substantiallyhorizontally disposed supports located in angular relation to the saw,an arm slidably mounted on each support, and a guide element secured toand movable with the arms.

3. In a saw-guide, the combination With spaced substantiallyhorizontally disposed supports, of arms slidably mounted on the opposinginner faces of the supports, and a guide element secured to and movablewith the arms, said element extending across the space between thesupports.

4. In a saw-guide, the combination with spaced supports, of guidingelements arranged to engage opposite sides of the saw, adjustableconnections between the inner sides of the spaced supports and one ofthe guide elements, and adjustable connections between the other guideelement and the outer sides of the supports.

5. In a saw-guide, the combination with spaced substantiallyhorizontally disposed supports, of arms slidably mounted on theopposinginner faces of the supports, a guide element secured to andmovable with the arms, said element extending across the space betweenthe supports, and operating mechanism for the arms arranged on theexterior faces of the supports and engaging the same.

6. In a saw-guide, the combination with spaced parallel supports havinglongitudinally disposed slots, ot' an arm slidably mounted on each ofsaid supports and having a lug slidably located in the slot thereof,operating mechanism for the arms engaging the lugs, and a guide elementattached to the ends of the arms and movable therewith.

7. In a saw-guide, the combination with spaced substantially parallelsupports having longitudinally-disposed slots, of an arm slidablymounted on each of said supports IOO and having a lug disposed in theslot thereof,

operating mechanism for the arms engaging' secured to the standards, aninner guide mem ber secured to and slidable between the supports, and anouter guide member also secured to the supports and movable thereontoward and from the inner member.

9. -In a saw-guide, the combination with spaced supports, of an arm adjustably engaging each support, and a guide element having pivotalconnections with the arms.

10. In a saw-guide, the combination with spaced supports, of an armslidably mounted upon eachv support, means for holding the arms againstindependent movement upon their respective supports, and a guide elementhaving pivotal connections with the arms.

11. In a saw-guide, the combination with spaced supports, of a guideelement pivoted at one end to one of the supports and having a hook atthe other end that detachably engages the other support.

12. In a saw-guide, the combination with spaced supports, of a guideelement, a pivot connection between one end of the guide element and oneof the supports, the other end of said element havingahook, a boltlocated upon the other support and arranged to be engaged by the hook,said bolt and pivotal connection being adjustable upon their respectivesupports.

13. In a saw-guide, the combination with spaced supports, of ,an innerguide elementv having adjustable connections at its opposite A ends withthe supports, and an outer guide element having adjustable connectionsat its opposite ends with the supports.

14. In a saw-guide, the combination with spaced standards, or' supportshaving yokes which embrace the standards, an inner guide element havingslidable connections at its opposite ends with the supports, means forholding'said guide element against movement, an outer guideelement, andadjustable means connecting said outer guide element'and the supports.

15. Ina saw-guide, the combination with spacedv standards, of supportsat their outer ends which embraceV the standards, .braces connected tothe inner ends of the supports,l

an inner guide element having slidable connections at its opposite endswith the supports, means for holding said element against movement, andan outer guide element having adjustable connectionsv at its oppositeends with the supports.

In testimonyvthat I claim the foregoing as my own I have hereto affixedmy signature i the presence of two witnesses. y

CHARLES RYAN HORN.v

WVitnesses:

JNO. E. MCPARLAN, C. W. OoLEY.

